CN1312915A - Contaminant resistant, cleanable, light reflective surface - Google Patents
Contaminant resistant, cleanable, light reflective surface Download PDFInfo
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- CN1312915A CN1312915A CN99809712A CN99809712A CN1312915A CN 1312915 A CN1312915 A CN 1312915A CN 99809712 A CN99809712 A CN 99809712A CN 99809712 A CN99809712 A CN 99809712A CN 1312915 A CN1312915 A CN 1312915A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/0816—Multilayer mirrors, i.e. having two or more reflecting layers
- G02B5/0825—Multilayer mirrors, i.e. having two or more reflecting layers the reflecting layers comprising dielectric materials only
- G02B5/0841—Multilayer mirrors, i.e. having two or more reflecting layers the reflecting layers comprising dielectric materials only comprising organic materials, e.g. polymers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/18—Coatings for keeping optical surfaces clean, e.g. hydrophobic or photo-catalytic films
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0221—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having an irregular structure
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/0236—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element
- G02B5/0247—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place within the volume of the element by means of voids or pores
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0284—Diffusing elements; Afocal elements characterized by the use used in reflection
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/0808—Mirrors having a single reflecting layer
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- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
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- Optical Elements Other Than Lenses (AREA)
Abstract
A diffusely reflecting material adapted to resist contamination. The material is preferably a layer of expanded PTFE with a transparent barrier layer of PFA or FEP, for example, disposed on it. If contamination does occur, the material is adapted to be cleaned and restored substantially to its original reflectance.
Description
Background of invention
Invention field
The present invention relates to be used for the surface of light reflex, in particular to the light reflective surface of porous, and the pollution that prevents this surface.
The description of association area
In the purposes of wide range, light reflective surface can be used for various purposes.Light reflective surface is commonly used to make light to change direction to surface, target or a zone needing.On the contrary, also can be used to arrive a surface, target or regional light quantity partly or entirely decays.
Light reflective surface generally is categorized as direct reflection and diffuse reflection.In fact this general classification refers to possible successive range.At the one end, according to reflection law, desirable specular reflection surface changes the direction of incident beam, and with respect to for reflection spot and reflecting surface tangent plane, catoptrical angle equals the angle of incident light.At its other end, desirable diffuse reflection surface diffuses on all directions according to the cosine distribution function.A kind of material is that reflection or irreflexive degree can be classified by the bidirectional reflectance distribution function.
The example that is mainly specular reflection surface has the aluminium and the metallized film (as SILVERLUX , 3M, St.Paul, MN sale) of silver-plated mirror, polishing.The example that is mainly diffuse reflection surface comprises magnesium oxide, expanded polytetrafluoroethyl(ne (herein, teflon is abbreviated as " PTPE "), other form of porous PTFE is (as SPECTRALON , Labsphere, Inc., North Sutton, NH sells) and other porous polymer such as nylon, polyvinylene and cellulose acetate.Be in that other surperficial example has cold forging aluminium on the successive range between ideal mirror reflection and the desirable diffuse reflection, its surface is mainly direct reflection, and certain diffusing is provided simultaneously, in addition adularescent enamel, be mainly diffuse reflection, but contain certain significantly direct reflection component.
In many purposes, normal (if not absolute words) reflecting surface efficient maximum that requires.The light reflective surface of reflectivity very big (by definition) can and absorb all very little material by transmittance in the wavelength coverage of needs and constitute.
To requiring the purposes of high-level diffuse reflection (＞92% reflection), the porous PTFE of expanded PTFE and other form is suitable material.Partly cause is that its light absorption in the wide wavelength coverage from UV-C to nearly IR (promptly from 180nm-2500nm) is extremely low.The various forms of porous PTFE can be successfully is its thermotolerance, chemical stability and anti-UV degradability as other reason of reflecting material.It is that this material can be done very thinly that expanded PTFE also has a benefit, is flexible and compliance, so easy for installation and economical.Such high-efficiency multiple reflecting material successfully is applied to many purposes, comprises that calibration standard, LCD back light, photoinduction chamber (phtoinductionchamber) and various lighting device comprise small fluorescent groove spotlight.
Yet because the character of these structures, the porous reflecting material is easy to be invaded by low surface tension liquid.Therefore many energy absorbing light reduce reflectivity in these liquid.In some cases, low surface tension component such as solvent or detersive can play carrier function, can bring in its hole by light absorbing material.So, any on porous reflecting material structure or residue wherein can reduce the surface reflectivity.These pollutants can not be removed with conventional method, are difficult to or can not on-the-spot extract and remove.
Therefore, need a kind of conventional method cleaning that adopts, be used to reflect the improvement material of UV and visible light.
Summary of the invention
The invention provides the material and the method for the improvement reverberator that is used for UV and visible light, this material can adopt the conventional method cleaning, can be effective to require any purposes of effective diffuse reflection surface.The present invention uses a kind of porous reflecting material, is preferably expanded PTFE, and this material has the interconnected polymkeric substance node of fibril of the micro cellular voids of defining.In addition, on reflecting material, place the protective seam of one deck substantially transparent, prevent the microcellular structure of pollutant intrusion reflector plate.It is easy to clean that this protective seam also provides, and is difficult for contaminated smooth surface.The composite structure of Xing Chenging can keep the reflecting properties of porosint needs basically in such a way, and makes degree and the persistence minimum that exposes to the negative effect that pollutant causes.
The present invention is preferably in the embodiment; the expanded PTFE sheet is the porous reflecting material; protective seam is that one deck thin Teflon tetrafluoraoethylene-hexafluoropropylene copolymer (FEP) or Teflon tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA) film (all can be from E.I.Dupont de Nemours Inc.; Wilmington, DE buys).This combination also has some benefits except that above-named benefit.The first because this material is flexible high, just can make multiaspect cavity or parabolic reflector by this material of a slice, so just can reduce the multi-disc product intrinsic many seams, therefore, total reflectivity raising.The second, this material is easy to die-cut, adopts effective and clean method can make every and reaches suitable dimensions.The 3rd, confirmed that expanded PTFE has good reflectivity properties, even under the thinner thickness situation (as＜1 millimeter),, reduce material volume so the composite luminaire of making is comparatively light, more more cheap than at present available material.Because porous reflecting material and these two kinds of components of protective seam are highly stable under very wide environmental baseline, do not change in time, this compound is adapted at requiring application steady in a long-term under the severe environmental conditions.And the UV light absorption of these two kinds of components is all very low, and is also unaffected under the harmful wavelength situation of frequent irradiation.
The accompanying drawing summary
By below in conjunction with the description of the drawings, can understand function of the present invention, wherein accompanying drawing better:
Fig. 1 is the sectional view of one embodiment of the invention reflecting material;
Fig. 2 is the reflectivity of commercially available material and the curve of wavelength;
Fig. 3 is the reflectivity of one embodiment of the invention and the curve of wavelength;
Fig. 4 is the reflectivity of commercially available material and the curve of wavelength;
Fig. 5 is the reflectivity of one embodiment of the invention and the curve of wavelength.
The present invention describes in detail
The present invention relates to the film of light reflex. Be specifically related to light reflective properties in ultraviolet light and visible wavelength High surface. Term used herein " light " comprises various forms of electromagnetic radiation, especially can at UV-See light (250-750 wavelength) until the scope of infrared light (IR) radiation (750nm-is greater than the 2500nm wavelength). These Reflecting surface can be used for for example lighting use and photoinduction chamber.
" illumination " refers to comprise the device of wide range classification, as lighting device, display, optical projection system, PS and illumination sign system. The object lesson that illumination is used is included in purposes in the luminaire such as small-sized glimmering Light groove spotlight, be used for the back light of liquid crystal display, at photography guard shield (photographic umbrella) In and in the equipment PS.
" photoinduction chamber " is meant any spatial dimension that reflects luminous energy in a controlled manner, so that carry out physics, chemistry or biological variation by the luminous energy that projects on certain surface or the material.The photoinduction chamber generally includes one or more UV and/or visible light source and at least one and is used to make light to redirect to the reverberator of target material.In addition, the wall of photoinduction chamber is made of reflecting material, makes parasitic light redirect to target material, is improved the efficient of this system.This photoinduction chamber can partly or entirely be sealed, so that stay luminous energy or guiding direction of light.Usually, batch process adopts all chambers of sealing, and continuity method is used partially enclosed chamber usually.
For making viable commercial, the wavelength coverage that all such reverberators are passed in time at needs must keep its reflectivity substantially.So, can expose in the purposes of pollutant at reflecting surface, because can obviously reducing reflecting material, pollutant requiring the reflectivity of wavelength coverage, so any surface of exposing should possess ability and " can clean " (promptly adopt conventional method as using isopropyl alcohol, can make the performance of contaminant removal) of anti-this pollutant.
The present invention is specifically related to a class porous reflecting material, and can prevent contaminant infiltration method wherein.The porous reflecting material generally is the variant of polymkeric substance more well known by persons skilled in the art and this base polymer.The porous polymeric structure can be inserted as ceramic powders.Refractive index is more than or equal to 1.42, and porosity is that the polymkeric substance of 10-90% is suitable as reflecting material.The example of these polymkeric substance includes but not limited to the porous polymer film made by PTFE, nylon, Kynoar (PVDF), cellulose acetate, polyester, polystyrene, polycarbonate, acrylic acid, polyacrylonitrile, methyl methacrylate, polypropylene, tygon, Polyvinylchloride or polyamide.The concrete polymkeric substance that uses in the application depends on the reflectivity of requirement, together with other material character such as temperature and chemical compatibility, intensity, thermal expansivity, UV stability and cost etc.
Porous PTFE is owing to its reflectivity height and thermotolerance, chemical stability and anti-UV degradability height, so be particularly suitable reflecting material.A kind of commercially available porous PTFE reflecting material is Labsphere, Inc., and ofNorth Sutton, NH is with SPECTRALON trade name product sold.This material is the polytetrafluoroethylgranule granule material, and loose filling also is molded into the form of lump.Though this material provides good visible light and nearly IR reflection of light, its reflectivity descends during less than 325 nanometers at the UV wavelength.It also has other shortcoming, has limited its use.These shortcomings comprise because its hardness causes the difficulty that adds man-hour, especially when requiring the situation of on-plane surface reflecting surface; Scope in the effective light reflection of the scope of UV-visible light and IR light is restricted; Minimum thickness big (because of thickness approximately less than 4 millimeters time its usable reflection reduce); And do not reach optimum reflectivity.
Owing to multiple reason, best commercially available porous reflecting material is an expanded PTFE.According to United States Patent (USP) 3,953,566,3,962,153,4,096,227,4,187,390 and 4,902, the expanded PTFE that 423 (these patent references are incorporated into this) are made can be used as efficient diffuse reflector.This expanded PTFE material comprises micro-polymerization fibril (the being thread element) microcellular structure of interconnection polymkeric substance node (particle that promptly manifests fibril).Term used herein " expanded PTFE ", comprise any PTFE with node and fibrillar structure, its range of structures is from having little foaming structure of the relatively large node of fibril auto polymerization material expansion, up to having the structure that only intersects each other in the extreme foaming of the fibril of node.
Expanded PTFE possesses several important performances, makes it be particularly suitable as reflecting surface.At first, PTFE is hydrophobic and the material height inertia.Therefore, this material can bear the adverse effect of water and other various materials that can endanger some other reflecting surfaces.In addition, according to United States Patent (USP) 3,953,566 modes that disclose are made expanded PTFE, and the tensile strength of this material obviously improves, and the highly flexible that becomes.And the particle PTFE of filling provides good reflectivity properties, and the node of expanded PTFE and fibrillar structure provide much higher reflectivity.
Although the porous reflecting material is of great use, can't be fit to many kinds of purposes so far, because its porous structure can allow low surface tension liquid such as solvent, grease and oils comprise that grease penetrates into out on the staff.These liquid meeting absorbing light cause that the reflectivity of porous reflecting material reduces.When being subjected to fully polluting, the sector-meeting of this porous reflecting material becomes almost completely absorbefacient.Adopt conventional method as using isopropyl alcohol, clean its porous reflecting surface, the initial reflecting properties of material almost fails to be restored as a result.Though obtain cleaning on the surface of exposing, but a large amount of harmful pollutant remains in the porous structure still.Therefore, only depend on this porous reflecting material itself not to be suitable for the purposes that reflecting surface exposes to the environment that contains harmful this pollutant of amount.
The invention provides a kind of improving one's methods, adopt this method, porous polymer can be in exposing to pollutant and requires to be used as reflecting surface in the purposes of cleanablity.This novel reflection compound is the combination of above-mentioned a kind of porous polymer and protective clear layer.Fig. 1 has illustrated the present invention.Shown in the figure one deck reflecting material 10 stacked being fixed on the protective clear layer 11.
Protective seam should cover the whole porous surface that exposes to noxious pollutant and will be used for light is reflected basically.This protective seam is essentially transparent to the light that requires, and can stop the infiltration of pollutant, should not produce negative effect when contacting with conventional cleaning solvent such as isopropyl alcohol.To other requirement of protective seam, depend on different purposes, comprise the ability that adheres to the porous reflecting surface, flexible degree, anti-UV degradability, to the bearing performance of temperature variation and thickness etc.For example, UV is solidified the photoinduction chamber, Teflon PFA and Teflon FEP are well suited for, because they can see through UV light basically, do not have harmful effect through UV irradiation, these materials are chemically inert, can bear quite high maximum temperature (temperature range is wide), have good not stick nature (therefore easy to clean), and can adhere to well on porous reflecting material, the especially expanded PTFE.
Except Teflon PFA and Teflon FEP film; the protective layer material that other is available; include but not limited to as polymkeric substance such as theoretical density (full-density) PTFE, polycarbonate, polymethylmethacrylate, polyester, polystyrene, Kynoar, tygon, polypropylene, polyetheretherketone, polyethersulfones, and other low plastics of frequency range absorptivity that require the user.In addition, suitable glass, quartz not can be used as protective seam many requiring in the flexible purposes yet.
The present invention a kind of by two-way expanded PTFE as the porous reflecting material, Teflon FEP can make according to following mode as the better reflecting material that protective clear layer constitutes.Fine powder PTFE resin is mixed with a kind of lubricant such as odorless Mineral spirits, up to forming potpourri.Lubricant quantity should be able to sufficient lubrication PTFE resin primary granule, make push before the suffered shear action minimum of particle.
Then, this potpourri is pressed into blank, pushes then,, push and obtain the good sheet of internal bond as by the plunger piston type extruder.Adopt about 30: 1 to 300: 1 ratio of compression (being the cross-sectional area of ratio of compression=extruder barrel cross-sectional area) divided by extrusion die.To most of purposes, ratio of compression be 75: 1 to 100: 1 for good.
Then, as removing lubricant by evaporation, the about 1.1-50 that makes dried extrudate piece be expanded to its original length rapidly at least one direction doubly (better is about 1.5-2.5 doubly).The technology that expands is that dried extrudate piece is expanded by the rotation warm-up mill or the heating plate of series of temperature between 100-325 ℃, as United States Patent (USP) 3,953, and the method that discloses in 566.Also can be according to United States Patent (USP) 4,902, the method described in 423 before removing lubricant, allows extrudate piece expand.
No matter be any of above-mentioned two kinds of situations, the ratio that material can also 1.1: 1 to 50: 1 (being preferably 5: 1 to 35: 1) further expands, and forms final micro pore sheet.This sheet material should carry out two-way or multidirectional expansion, improves the intensity at its vertical and horizontal.At last this material is placed to be higher than 340 ℃ temperature, carry out amorphous locking step.
Material of the present invention better is to make sheet shape, because its intrinsic flexibility, can reshape as requested and is other different shape, as pipe, bar, convex or concavity structure etc.At the concrete purposes that proposes, material of the present invention can push or be configured as with other method the shape of continuous pipe, rod (being right cylinder), rectangle, uneven shape and other requirement in addition.
Can be made into the sheet material of thickness by above-mentioned procedure of processing 0.01-12 millimeter or bigger (being not limited thereto scope).Subsequently that these sheet materials are stacked mutually, and, apply enough pressure in about 300-400 ℃ scope, be bonded together.
Under the rising temperature,, one deck Teflon FEP layer is adhered on the expanded PTFE by exerting pressure.Applied pressure is generally less than 50psi, but better less than 5psi, scope is 0.5-5psi preferably.Temperature generally between 250-350 ℃, better is about 300 ℃.It is fully bonding to need to adopt enough pressure to carry out, but should make its minimum, prevents that the expanded PTFE sheet is subjected to supercompression.After adding protective clear layer, in being arranged, the purposes of risk of pollution just can utilize the effective advantage of expanded PTFE.The resistance tocrocking of this compound is better than single expanded PTFE, during with usual vehicle such as isopropyl alcohol, can recover its initial reflectivity fully.Add protective seam,, the diffuse reflection of expanded PTFE is reduced though its efficient can not be subjected to obvious influence.As long as protective material thickness is reduced to minimum and made pressure minimum in the adhesion process, can make this effect minimum.In another embodiment, can use bonding agent that protective seam is adhered on the reflecting material, bonding agent is with this two-layer being bonded together.
The present invention can comprise single or multiple lift porous reflecting material, also can comprise the sandwich of one or more layers a porous reflecting material and a backing propping material.Because some porous reflecting materials, especially porous polymer, if when bearing the effect of load or bearing heat, be easy to stretch or distortion, therefore, be preferably the porous reverberator is installed on the supporting layer, as be layered on flexible woven material or the non-woven material, just help to keep the shape of porous reverberator like this, during use.By polyurethane or the solvation polyurethane that applies a kind of jointing material such as moisture-curable, the proper supporting layer is fixed on the porous reflecting material, and then is fixed on the flexible back lining materials (as polyester, polypropylene, Mylar polyester, kevlar Nomex, nylon etc.).Exert pressure,, these two kinds of materials can be adhered to each other as between one or more pairs of nip rolls, carrying out roll-in.
In addition, form complicated shape, flexible porous reflector plate such as expanded PTFE can adhere on the rigid support material, form with this compound then, become as para-curve or oval domeshape.A kind of appropriate method that is used for such forming technique is to use vacuum forming equipment.
Following embodiment is provided, but does not constitute limitation of the scope of the invention.
Comparative example 1
From W.L.Gore﹠amp; Assiociates obtains the stratiform expanded PTFE of its Gore-Tex GR diaphragm seal.This material has 25 layers of expanded PTFE sheet, and gross thickness is 1.0 millimeters, and density is 0.57 gram per centimeter
3
Cleanablity according to this material of following described test.Cut out about 2 * 2 inches samples from this sheet material and be used for mirrored text.Use Perkin Elmer Lambda 18 Spectrophotometer, test the reflectivity of this sample at UV-visible-range (250-800nm).Then, a towel is immersed in 10% (weight) hydraulic oil, with this towel oil is wiped on the sample again, pollute this sample.Test the reflectivity of this sample once more, observe by original value obviously descend (＞50%).Dip in isopropyl alcohol with the cloth of no Soft flocks then and clean this sample, the reflectivity of mensuration is shown in Fig. 2.As shown in Figure 2, the reflectivity of sample, it is a lot of still to be lower than its primary reflection rate, although reflecting surface looks like cleaning.
Embodiment 1
The material of comparative example 1 is adhered on 0.0005 inch thick Teflon FEP of one deck.In 300 ℃, light (less than 5psi) expanded PTFE and 10 seconds kinds of Teflon FEP of pressing carried out bonding with the Carver laboratory press.Need wear the emgloves of no powder when taking these materials, and when pressurized adhesion is operated, this laminate will be placed between two 0.002 inch Kapton Kaptons, prevent that reflecting material from being polluted by hand or press with hand.
Cut out about 2 * 2 inches samples from sheet material and be used for reflection measurement.Use Perkin Elmer Lambda 18Spectrophotometer, test this sample at the UV-visible-range.Then, as comparative example 1,, pollute this sample with the towel wiping of dipping in 10% (weight) hydraulic oil.Test the reflectivity of this sample once more, observe reflectivity and obviously descend by original value.Dip in isopropyl alcohol with the cloth of no Soft flocks then and clean this sample, the reflectivity of mensuration is shown in Fig. 3.As shown in Figure 3, the sample reflectivity returns to initial value fully.
Comparative example 2
Carry out testing with Spectratlon PTFE sample, the results are shown in Fig. 4 with comparative example 1 same pollution and cleanablity.As shown in Figure 4, the influence that reflectivity is obviously polluted can not recover initial value with the isopropyl alcohol cleaning.
Embodiment 2
According to the mode same, the Spectratlon PTFE sample of comparative example 2 is bonded on 0.0015 inch thick Teflon FEP of one deck with EXAMPLE l.Then this compound is carried out testing with comparative example 1 same pollution and cleanablity, the results are shown in Fig. 5.As shown in Figure 5, although pollutant has obviously reduced the reflectivity of this compound, can return to initial value fully with the isopropyl alcohol cleaning.
Pre-example 1
If the material of comparative example 1 is adhered on 0.0005 inch thick Teflon FEP of one deck.In 300 ℃, light (less than 5psi) expanded PTFE and Teflon FEP10 kind second of pressing carried out bonding with the Carver laboratory press.Need wear the emgloves of no powder when getting these materials, and when pressurized adhesion is operated, this laminate will be placed between 0.002 inch Kapton Kapton, prevent that reflecting material wherein from being polluted by hand or press with hand.
Cut out about 2 * 2 inches samples from sample and be used for reflection measurement.Use Perkin Elmer Lambda 18Spectrophotometer, (250-800nm) tests this sample at the UV-visible-range.Then, as comparative example 1,, pollute this sample with the towel wiping of dipping in 10% (weight) hydraulic oil.Test the reflectivity of this sample once more, should observe by original value and obviously descend.Dip in isopropyl alcohol with the cloth of no Soft flocks then and clean this sample, measure reflectivity.Reflectivity should return to initial value.
Though describe and specific embodiments more of the present invention have been described, the present invention should not only limit to this.Obviously can in following claim scope, add various variations and be presented as component part of the present invention.
Claims (24)
1. one kind is used for goods that light is reflected, and these goods comprise that one deck porous reflecting material and one deck are placed on the protective clear layer on the described porous layer of reflective material.
2. goods as claimed in claim 1 is characterized in that described porous reflecting material is irreflexive material.
3. goods as claimed in claim 1 is characterized in that described porous reflecting material is selected from teflon, nylon, Kynoar, cellulose acetate, polyester, polystyrene, polycarbonate, acrylic acid, polyacrylonitrile, methyl methacrylate, polypropylene, tygon, Polyvinylchloride or polyamide.
4. goods as claimed in claim 1 is characterized in that described protective clear layer directly is placed on the described layer of reflective material.
5. goods as claimed in claim 1 is characterized in that described porous reflecting material is an expanded PTFE.
6. goods as claimed in claim 1 is characterized in that described protective clear layer is selected from PFA, FEP, PTFE, polycarbonate, polymethylmethacrylate, polyester, polystyrene, polyvinylene, tygon, polypropylene, polyetheretherketone, polyethersulfone, glass or quartz.
7. goods as claimed in claim 1 is characterized in that described protective clear layer is PFA.
8. goods as claimed in claim 1 is characterized in that described protective clear layer is FEP.
9. goods as claimed in claim 1 is characterized in that described porous reflecting material is an expanded PTFE, and described protective clear layer is selected from PFA or FEP.
10. goods as claimed in claim 9 is characterized in that described protective clear layer is FEP.
11. goods as claimed in claim 1 is characterized in that described protective clear layer covers described reflecting material basically, to prevent that described porous reflecting material is by the low surface tension material contamination.
12. goods as claimed in claim 1 is characterized in that described protective clear layer for what can clean, covers described porous reflecting material basically,
13. goods as claimed in claim 1 is characterized in that described protective clear layer is adhered on the described porous layer of reflective material.
14. goods as claimed in claim 1 is characterized in that described goods comprise that also one deck is fixed on the supporting layer on the described porous layer of reflective material.
15. goods as claimed in claim 14 is characterized in that described supporting layer is selected from polyester, polypropylene, Mylar polyester, Kevlar Nomex or nylon.
16. goods as claimed in claim 1 is characterized in that described porous reflecting material thickness is about the 0.01-12 millimeter.
17. goods as claimed in claim 1 is characterized in that described porous reflecting material layer thickness is 1.0 millimeters.
18. goods as claimed in claim 1 is characterized in that described transparency protected layer thickness is about the 0.0001-0.01 inch.
19. goods as claimed in claim 1 is characterized in that described goods have the described porous layer of reflective material of multilayer.
20. goods as claimed in claim 1 is characterized in that described porous reflecting material is irreflexive, described goods are not subjected to low surface tension material such as grease and oils to comprise the influence of human body grease.
21. a method of making reflective article, described method comprise the following steps: that (a) provides one deck layer of reflective material; (b) provide the layer of transparent protective seam; (c) described layer of reflective material is adhered on the described protective clear layer.
22. method as claimed in claim 21 is characterized in that described adhesion step comprises heating described layer of reflective material and described protective clear layer to about 250-350 ℃, the while applies approximately the pressure less than 50psi on described layer of reflective material and protective clear layer.
23. method as claimed in claim 22 is characterized in that described temperature is about 300 ℃, described pressure is approximately less than 5psi.
24. a method that prevents that the reflecting material reflectivity from reducing, described method are included in the step of placing protective clear layer at least a portion of described reflecting material.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13581098A | 1998-08-18 | 1998-08-18 | |
| US09/135,810 | 1998-08-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1312915A true CN1312915A (en) | 2001-09-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99809712A Pending CN1312915A (en) | 1998-08-18 | 1999-08-09 | Contaminant resistant, cleanable, light reflective surface |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP1105752B1 (en) |
| JP (1) | JP2002523796A (en) |
| CN (1) | CN1312915A (en) |
| AU (1) | AU5474199A (en) |
| CA (1) | CA2340001A1 (en) |
| DE (1) | DE69903741T2 (en) |
| NO (1) | NO321020B1 (en) |
| WO (1) | WO2000011500A1 (en) |
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| CN102167841A (en) * | 2010-12-06 | 2011-08-31 | 宁波东旭成化学有限公司 | Method for preparing optical reflection film |
| CN102463724A (en) * | 2010-11-12 | 2012-05-23 | 林兴利 | Double-layer foaming uniaxial tension polymerized film structure |
| CN106633408A (en) * | 2016-12-30 | 2017-05-10 | 苏州欧普照明有限公司 | Reflector |
| CN109837724A (en) * | 2019-04-09 | 2019-06-04 | 曹佑武 | A kind of degreaser for textile |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5840967A (en) | 1996-08-29 | 1998-11-24 | Nycomed Imaging As | Process for the preparation of contrast agents |
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| US5596450A (en) * | 1995-01-06 | 1997-01-21 | W. L. Gore & Associates, Inc. | Light reflectant surface and method for making and using same |
| TW344032B (en) * | 1995-01-27 | 1998-11-01 | Mitsui Toatsu Chemicals | Light reflective sheet and light reflector using it |
| JP3683965B2 (en) * | 1995-01-27 | 2005-08-17 | 三井化学株式会社 | Light reflector and light reflector using the same |
| DE69624077T2 (en) * | 1995-06-23 | 2003-06-12 | Furukawa Electric Co Ltd | LIGHT REFLECTING PLATE |
| US5838406A (en) * | 1995-08-29 | 1998-11-17 | W. L. Gore & Associates, Inc. | Light reflectant surface of expanded polytetrafluoroethylene with nodes and fibrils for backlit liquid crystal displays |
| JP3797743B2 (en) * | 1996-05-27 | 2006-07-19 | 日東電工株式会社 | Method for producing antifouling film |
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1999
- 1999-08-09 AU AU54741/99A patent/AU5474199A/en not_active Abandoned
- 1999-08-09 WO PCT/US1999/018082 patent/WO2000011500A1/en active IP Right Grant
- 1999-08-09 EP EP99941007A patent/EP1105752B1/en not_active Expired - Lifetime
- 1999-08-09 DE DE69903741T patent/DE69903741T2/en not_active Expired - Lifetime
- 1999-08-09 JP JP2000566701A patent/JP2002523796A/en active Pending
- 1999-08-09 CN CN99809712A patent/CN1312915A/en active Pending
- 1999-08-09 CA CA002340001A patent/CA2340001A1/en not_active Abandoned
-
2001
- 2001-02-16 NO NO20010795A patent/NO321020B1/en not_active IP Right Cessation
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| CN102167841A (en) * | 2010-12-06 | 2011-08-31 | 宁波东旭成化学有限公司 | Method for preparing optical reflection film |
| CN102167841B (en) * | 2010-12-06 | 2012-10-03 | 宁波东旭成化学有限公司 | Method for preparing optical reflection film |
| CN106633408A (en) * | 2016-12-30 | 2017-05-10 | 苏州欧普照明有限公司 | Reflector |
| CN109837724A (en) * | 2019-04-09 | 2019-06-04 | 曹佑武 | A kind of degreaser for textile |
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Also Published As
| Publication number | Publication date |
|---|---|
| NO321020B1 (en) | 2006-02-27 |
| DE69903741T2 (en) | 2003-09-11 |
| JP2002523796A (en) | 2002-07-30 |
| NO20010795D0 (en) | 2001-02-16 |
| EP1105752B1 (en) | 2002-10-30 |
| CA2340001A1 (en) | 2000-03-02 |
| AU5474199A (en) | 2000-03-14 |
| DE69903741D1 (en) | 2002-12-05 |
| NO20010795L (en) | 2001-03-26 |
| WO2000011500A1 (en) | 2000-03-02 |
| EP1105752A1 (en) | 2001-06-13 |
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